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Method for holding and releasing stacked heat spreaders in tubes to eliminate surface scratching during dispensing

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for holding and releasing stacked heat spreaders in tubes to eliminate surface scratching during dispensing. Benefits include improved reliability, improved ease of manufacturing, and improved ease of implementation.

Country

United States

Language

English (United States)

This text was extracted from a Microsoft Word document.

At least one non-text object (such as an image or picture) has been suppressed.

This is the abbreviated version, containing approximately
50% of the total text.

Method for holding and releasing stacked heat spreaders in
tubes to eliminate surface scratching during dispensing

Disclosed is a method for holding and releasing stacked heat spreaders in tubes to eliminate
surface scratching during dispensing. Benefits
include improved reliability, improved ease of manufacturing, and improved ease
of implementation.

Background

� � � � � Top
surface scratches occur on heat spreaders when the spreader is slid off the
bottom of the tube stack (see Figure 1). These scratches are generated by the
weight of the entire stack of heat spreaders resting on the top of the bottom
spreader as it is slid out from the bottom of the stack.

� � � � � One
conventional solution is coin stack presentation (see Figure 2). Parts are
presented and removed from the top of the stack and indexed upward from the
bottom. This� eliminates the applied
pressure of the stacked units resting on an individual unit being slid or
removed from the stack.

General description

� � � � � The disclosed method is a simple mechanism that applies
pressure to the side of the shipping tube, which in turn applies pressure to
the edges of the stacked heat spreaders within the tube. This applied pressure
supports the stack of heat spreaders on demand reducing the overall weight that
is transferred from the spreader stack to the bottom spreader after it is
dropped into a précising pocket and slid out from under the stack prior to
being presented for placement.

� � � � � The key elements of the method include:

• � � � � Pincher mechanism that applies a
line of direct pressure to the side of the shipping tube

• � � � � Manifold and valve system to
supply air pressure to the pincher actuator

• � � � � Sensor feedback system that signals the valve system and pincher to
apply pressure or release pressure as required to hold or release heat
spreaders

Advantages

� � � � � The disclosed method
provides advantages, including:

• � � � � Improved reliability due to defect
prevention by supporting the
spreader stack weight during the presentation of the spreader by the slider
plate